CRANBERRY TWP — Psychic investigators Jean McKenzie Vincent and Suzanne Vincent will host a free discussion from 7 to 9 p.m. Oct. 13 at the Cranberry Library, 2525 Rochester Road.

Topics include the Caylee Marie Anthony murder case, the Haleigh Marie Cummings missing case, the John Yelenic murder case along with ghost stories and hauntings. Those attending may share unusual photos or stories. For reservations, call the library at 724-776-9100.

The music department of Butler High School, 120 Campus Lane, will present a free concert at 7:30 p.m. today in the auditorium. The concert choir, chanticleer singers and girl's ensemble will perform.For information, call Brian Helsel at 724-214-3200, Ext. 5229 or e-mail bryan_hensel@butler.k12.pa.us.

PETROLIA — A poker run and benefit will be held from 1 to 11 p.m. Sunday at the Beer Garden, 2399 Oneida Valley Road, to benefit Glenn Freedline of Concord Township, who was injured in a car accident.Poker run sign-up is at 10 a.m., and the last bike leaves at noon. There will also be children's activities, a Chinese auction, 50/50 raffle and more.For information, call Leaha Greenawalt at 724-791-9970.

Lifesteps, 383 New Castle Road, Butler, will hold free child development screenings from 10 a.m. to noon Monday.Visits take about 30 minutes, and results are discussed immediately.The screening examines development in playing, talking, seeing, hearing, moving and thinking.Appointments are recommended, but not required. For information or to schedule, call Lifesteps at 724-283-2154, Ext. 313, or 800-225-2010.

GIBSONIA — The Greater Harmony Chorus will host a guest night at 7 p.m. Tuesday for all previous members and women who love the joy of singing at Richland Elementary School, 3811 Bakerstown Road.The group will begin learning Christmas songs. All are invited to rehearse each week for the Dec. 4 Christmas show.For reservations, call 412-486-1290 or 724-924-2258. For information, visit www.greaterharmony.org.

FREEPORT — The Freeport Library, 428 Market St., seeks donations of clean, usable household items for their November "Holiday New To You" sale. Drop off donations during regular library hours.